Woodworking machinery



March 7, 1933. J. J. EGAN 1,900,336

WOODWORKING MACHINERY Filed Feb. 28, 1931 4 Sheets-Sheet 1 JOHN JOSEPH EGA ATTORNEY.

FIG.

March 7, 1933. J. J. EGAN WOODWORKING MACHINERY Filed Feb. 28, 1931 4 Sheets-Sheet 2 JOH N JOSEPH EGAN.

BY w 'ATLTORNEY.

'March 7, 1933. J. EGAN 1,900,336

WOODWORKING MACHINERY Filed Feb. 28', 1931 4 Sheets-Sheet 3 FIG. 3.

Q I INVENTOR:

JOHN JOSEPH E) BY I M) ATTORNEY.

March 7, 1933. .1. J. EGAN WOODWORKING MACHINERY Filed Feb. 28, 1931 4 Sheets-Sheet 4 INVENTOR:

JOHN- JOSEPH E AT TORNEY.

Patented Mar. 7, 1933 PATENT OFFICE JOHN J. EGAN, or SAN rmmcrsoo, CALIFORNIA WOODWORKING MACHINERY Application filed February 28, 1931. Serial No. 515,920.

adapt a power operated plane to manual application. v

Another object is to so combine and arrange the machine that it is capable of a wide range of uses.

A further object is to simplify the construction and mode of operation of the machine so that it may produce the maximum amount of work in a given time with the minimum of physical exertion by. the operator.

In this specification and the accompanying drawings the invention is disclosed in its preferred form. It is to be understood, however, that it is not limited to this form, because it may be embodied in other forms, within the spirit of the invention, as defined in the claim.

In the four sheets of drawings:

Fig. 1 is a plan view of a power plane constructed in accordance with this invention.

Fig. 2 is a vertical section of the same taken on the line IIII, Fig. 1.

Fig. 3 is a vertical section of the same taken on the line IIIIII, Fig. 1 and look ing in the opposite direction from Fig. 2.

Fig. 4 is a side elevation taken in the direction of the arrows IV-IV, Fig. 1 of the plane and the guiding means therefor.

Fig. 5 is a detail view in side elevation of a modified form of guide.

Figs. 6, 7 and 8 are detail views of various forms of cutting blades adapted for use in this machine.

In detail, the construction illustrated in the drawings comprises the interspaced side plates 1 and 2 joined by the transverse rods 4, 5 and 6 to form a rigid structure. The plates are provided with the handles 7 and 8, the rear ends of which are mounted on the lugs 910 projecting upwardly from the rear arcuate portions of the plates. The front ends of the handle are supported by the standards 11-12 extending above the front portion of the plates. Grips, such as 7.40 and 8a may be also provided on the plates 1 and 2 for convenience in handling the machine.

The bed plate 13 is pivotally mounted on the fixed rod 6 and has the arms 16 and 17 extending longitudinally therefrom. The prime mover is mounted on the bed plate 13 between the raised arcuate portions of the plates 1 and 2.

The rack teeth 18 are cut in the front end of the arm 17 and are enmeshed by the worm 19. The worm is mounted on the stem 20 journaled in the lugs 21-22 of the plate 2. The handle 23 is fixed to the upper end of the stem and is adapted to be grasped by the operator to manually rotate the worm 19. This raises and lowers the arm 17 to determine the depth of the planer cut as Will be later more fully described.

The ends of the working shaft 24 are journaled at 2424 in sultable antifriction bearings in the arms 16-17. The grooved pulley 25 is fixed on the shaft 24 and is engaged by the V-belt 26. A similar pulley 27 is mounted on the shaft 15 of the prime mover and is adapted to drive the belt 26 and the pulley 25. The two pulleys 25-27 are preferably of equal diameter to rotate the shaft 24 at motor speed, 1600 R. P. M.

The cutter head 28 is fixed to the shaft 24 by the setscrew 29 threaded in the. head and engaging a suitable keyway milled in the shaft 24. The head is of conventional construction and comprises the hub 30 having the radial arms 3131.

The periphery of the head is divided into two segments 33-33. One end of each of the segments is fixed to the radial arms 31 and is overlapped by the free. end of the opposite segment. The transverse grooves thus formed are adapted to receive the cutting blades 35.

The setscrews 36-36 clamp the blades between the overlapping ends of the segments. The blades may be readily removed by loosening the setscrews 36.

The blades have a body 35 which is slotted at 35 to receive the setscrews 36 when the blade is inserted in the head 28.

The blade is sharpened at 35" to form a cutting edge.

The cutting edge 35; (see Fig. 8) 1s formed to cut the edges of boards preparatory to jointing. As shown, the cutting length of the to prevent strewing of the shavings and dust when the machine is operating. Access to the blades may be obtained y removing the screws 39 and detaching the shield.

The resilient guides 40-41 are fixed to the underside of the plates 1 and 2 to guide the machine on the surface to be dressed.

The journal boxes 42-43 are riveted on the ends of the guides and pivot the guides on the lugs 44-45 at each end of the plates 1-2.

Where the surface to be dressed is either convex or concave, it is desirable to adjust the resilient guides to coincide. This is accomplished by the stems 46-46, the lower ends of which are bent inwardly at 50 to engage theboxes 51-51 riveted near the center of each of the guides.

The stems are vertically slidable in the lugs 47-47 on the plates 1-2. The upper ends of the stems are threaded to receive the adjusting nuts 48-48. The yokes 49-49 are integral with the plates 1-2 and confine the nuts 48 against vertical movement.

Manual rotation of the nuts 48 moves the stems 46 upward or downward. This curves the guides 40-41 to conform with the curve of the surface to be dressed. The plates 1 and 2 are arcuately undercut at 52 for clearance for the adjustment of the guide 40-41.

For the various uses of the machine, several different types of guiding means are required. The following is desirable where the surface to be dressed is at a distance from the edge of the work.

The bracket 53 is mounted on the rods 4 and 6 which extend beyond the plate 1. The knurled setscrews 54-54 maintain the bracket in adjusted position on the rods 4-6. The bracket may be removed from the machine by loosening the knurled screws 54 and sliding the bracket ofi the ends of the extensions 4-6.

The ends of the bracket are slotted at 55- 55. The resilient guide 56 is adjustably mounted in these slots by the bolts 56-56 passing therethrough. The guide is adapted to abut the edge of the surface to be dressed to maintain the machine in a fixed longitudinal plane.

Where the edge of the work is circular, it is necessary to curve the resilient guide 53 to conform. This is accomplished by the threaded stem 57 attached to the'center of the guide. The nut 58 engages the stem 57 and is confined in the slot 59 in the bracket.

Manual rotation of the adjusting nut 58 moves the threaded stem 57 transversely. This curves the resilient guide to coincide with the guiding edge of the work.

Where the surface to be dressed is adjacent the edge of the work, the following guiding means is desirable: The rigid guide 60 has the slots 61-61 at each end' and adapted to be mounted on the rods 4-6 between the plates 1 and 2. The bolts 62-62 maintain the guide 60 in fixed position on the rods 46. The lower portion of the guide extends beneath the cutter headat a sufiicient distance therefrom to maintain a clearance between the cutting blades and the guide.

In cases where the surface of the work is too narrow for the guides 40-41 to operate, it is advisable to use a guide such as 65 (see Fig. 5). This guide attached to the rods 4-6 in the same manner as the guide 60. The lower portion of the guide 65 has the interspaced upwardly projecting lugs 66-66 bent over at 67-67 to engage the top surface of the work.

The circular knives 70-70 are adjustably mounted on the shaft 72 in front of the cutter head 28. The knives have the sharpened bevel edges 73 to score the surface of the work on each side of the advancing cutter head. This prevents chipping of the wood on the sides of the cut.

The shaft 72 is mounted at each end in the abjustable journals 74-74. The stems 75-75 are fixed to the journals 74 and are guided in the lugs 76-76 on the plates 1 and 2. The adjusting nuts 77-77 are threaded on the upper ends of the stems 75 and are confined against vertical movement by the yokes 78 integral with the plates 1 and 2.

Manual rotation of the'nuts 77 slides the stems 75 upward or downward, raising or lowering the shaft 72 as desired. The cut of the circular knives 70 may thus be adjusted to the desired depth. The knives 70 may also be raised from contact with the Wood by continued rotation of the adjusting nuts 77.

The switch 80 is mounted on the side of the plate 1 and is connected to a suitable current source and to the motor 15 through the conduit 81. The operating trip lever 83 is pivoted at 82. The end 84 of the trip extends under the handle 7 and is adapted to be grasped by the operator. The opposite end of the trip 83 is connected to the switch lever 85 by the link 86.

Thus, when the trip 84 is moved upward, the switch 80 is closed, and the electric motor 15 is started.

The invention operates substantially as follows: The required type of cutting blades 35 are inserted in the cutter head 28 and the retaining screws 36 are tightened.

The operator then grasps the: handles 7 and 8 and manually raises the trip 84, starting the motor 15. The head 28 is then driven by the motor 15 through the pulleys 27-25 and the belt 26.

The handle 23 is then manually turned rotating the worm 19. This lowers the frame 17-18 and the head 28 until the blades 35 begin to cut the surface of the wood to the required depth.

The machine is then manually pushed in the direction of the arrow in Fig. 2 along the surface of the work. The guides 40-41 maintain the machine in a given plane above this surface to enable the blades 35 to make a smooth cut.

It is to be noted that the blades 35 revolve in the direction of the arrow in Fig. 2..

Thus, the blades 35 cut the work in the opposite direction from the travel of the machine. This enables a clean cut to be made without the danger of the wood splitting along the grain as the machine advances.

The working of the blades 35 also serves to propel the machine forward with less muscular exertion of the operator.

The guide 56, 60, or 65 is pressed along the edge of the work as the machine progresses to insure a straight out, if desired.

Having thus described this invention what is claimed and desired to secure by Letters Patent is:

A power plane comprising a pair of interspaced plates; rods rigidly connecting said plates and located above the bottom plane thereof; a frame between said plates having one end pivoted on one of said cross rods; a rotatable cutter journaled in the op- I posite end of said frame; means to raise and lower said frame and cutter wlth respect to said plates; a motor mounted on i said frame intermediate said pivot and, cutter; power transmission means driven by said motor and operatively engaging said cutter; a flexible horizontal guide attached to the bottom of each of said plates; and means for curvin said ides.

In testimony w ereof have hereunto set my hand this 21st day of Februar 1931.

JOHN J. E AN. 

